Scythecat Cub is a 2/2 for two mana that gives a creature a +1/+1 counter anytime a land enters the battlefield under your control
Of the 10 decks that dropped in price, the average decline was 13.2% (when including Dredge, it drops to a still respectable 10.8%), ranging from a high of 22.1% for Jund, which had multiple expensive reprints in Ultimate Masters (primarily Liliana of the Veil and Tarmogoyf), to a low of 4.3% from Hardened Scales (which didn't get many reprints at all)
While this opens up some fun tricks if you can find a way to give Yorion the ability to be played at instant speed (flash), you are also able to turn a blink spell that targets only one creature into a blink spell that can target as many as all of your creatures
The Ebon Praetor is presumably the strange, goat-skull-headed robed person with a fancy hat
A turn two NS can be attacking for 5 points of damage
Base Set 2 , unlike the original Base Set had a set symbol logo on the right sidea stylized 2 with a Pokball on top of it (see the bottom right corner of the Charizard artwork in the card below)